Lazy Pandas can do a headstand

This is very strange. I wouldn't expect the lazy ones to have this much hidden talent!

How to reproduce:

1. Spawn a lazy panda:

   /summon minecraft:panda ~ ~ ~ {MainGene:"lazy"}

2. Wait for it to lay on it's back
3. IMPORTANT: Drop some cake within its reach, so it doesn't get up. This does NOT work with bamboo.
   When it picks up the cake and begins eating it, it's standing on its head!

May take multiple tries.